Speed 1.distance travelled by an object in UNITTIME is called speed of that object. 2.speed - displacemant upon time 3. its unit is meter per second. 4.its scaler quantity 5.its unit is m/s velocity 1.rate of change of displacement is known as velocity 2.velocity - displacement upon time 3.it is a vector quantity 4.its unit is m/s hope this HELP u.pls mark me as brainlist